Fancier homepage and a bit of performance improvement through aggressive caching.

app.py

@@ -133,8 +133,13 @@ cached: dict = {
     "css_navbar": open("styles/header.css", "r").read(),
     "css_response": open("styles/human_readable.css", "r").read(),
     "css_collapsible": open("styles/collapsible.css", "r").read(),
+    "css_page": open("styles/page.css", "r").read(),
     "js_collapsible": open("js/collapsible.js", "r").read(),
     "js_shortcode": open("js/shortcode.js", "r").read(),
+    "favicon_svg": open("static/favicon.svg", "r").read(),
+    "book_info": kjv_cur.execute(
+        'SELECT "order", title_short, category, otnt, chapters FROM book_info ORDER BY "order"'
+    ).fetchall(),
 }
 
 # Fill the chapter list with unique chapters for seeking back and forward by index.
@@ -149,17 +154,52 @@ for book in range(1, 67):
         "SELECT c FROM fts_kjv where b = ? ORDER BY id DESC LIMIT 1;", (book,)
     ).fetchone()[0]
 
+# Cache book_id to bookname mapping for fast lookups
+cached["book_id_to_name"] = {}
+for row in kjv_cur.execute("SELECT b, n FROM key_english").fetchall():
+    cached["book_id_to_name"][row[0]] = row[1]
+
+# Organize books by testament and category for index page
+from collections import defaultdict
+testament_data = {"OT": defaultdict(list), "NT": defaultdict(list)}
+for book in cached["book_info"]:
+    book_order, title, category, testament, num_chapters = book
+    testament_data[testament][category].append({
+        "title": title,
+        "chapters": num_chapters
+    })
+cached["book_info_for_index"] = dict(testament_data)
+
+# Render the index page once and cache it
+with app.app_context():
+    from flask import render_template_string
+    template_content = open("html/index.html", "r").read()
+    cached["html_index"] = render_template_string(template_content, testament_data=cached["book_info_for_index"])
+
 @app.get("/js/shortcode.js")
 def serve_shortcode_js():
-    return Response(cached.get("js_shortcode"), mimetype='application/javascript')
+    response = Response(cached.get("js_shortcode"), mimetype='application/javascript')
+    response.headers['Cache-Control'] = 'public, max-age=31536000'
+    return response
 
 @app.get("/js/collapsible.js")
 def serve_collapsible_js():
-    return Response(cached.get("js_collapsible"), mimetype='application/javascript')
+    response = Response(cached.get("js_collapsible"), mimetype='application/javascript')
+    response.headers['Cache-Control'] = 'public, max-age=31536000'
+    return response
 
 @app.get("/styles/page.css")
 def serve_page_css():
-    return send_file("styles/page.css", mimetype='text/css')
+    response = Response(cached.get("css_page"), mimetype='text/css')
+    response.headers['Cache-Control'] = 'public, max-age=31536000'
+    return response
+
+@app.get("/favicon.ico")
+@app.get("/favicon.svg")
+def serve_favicon():
+    response = Response(cached.get("favicon_svg"), mimetype='image/svg+xml')
+    response.headers['Cache-Control'] = 'public, max-age=31536000'
+    return response
 
 def generate_short_id():
     remain = random.randrange(614_656, 17_210_367)  # resolves to length of 5
@@ -174,11 +214,10 @@ def generate_short_id():
 
 
 def lookup_bookname(book_id):
-    result = kjv_cur.execute(
-        "SELECT n FROM key_english WHERE b = ?;",(book_id,)).fetchone()
-    if result:
-        result = result[0]
-    return result
+    # Ensure book_id is an integer for cache lookup
+    if isinstance(book_id, str):
+        book_id = int(book_id)
+    return cached["book_id_to_name"].get(book_id)
 
 
 def lookup_book_id(bookname) -> int:
@@ -744,7 +783,7 @@ def idx(shortcode=""):
         logging.info(f"/{shortcode}")
         return resolve_shortcode(shortcode)
     logging.info(f"/{shortcode}")
-    return send_file("html/index.html")
+    return cached["html_index"]
 
 @app.get("/fe")
 def frontend():